Attachment I



Source references for 02.02 and 02.03



Probable Cause Definition


Probable cause exists when facts and circumstances within the officer’s knowledge, and about which the officer had reasonably trustworthy information, cause a man (person) of reasonable caution to believe that an offense has been or is being committed.




Carroll v. U.S., 267 U.S. 132 (1925); Texas v. Brown, 460 U.S. 730 (1983); Rodriguez v. State, 232 S.W.3d 55 (Tex. Crim. App. 2007); Davis v. State, 202 S.W.3d 149, 150-53 (Tex. Crim. App. 2006); Hughes v. State 24 S.W.3d 833, 838 (Tex. Crim. App. 200).


Reasonable Suspicion Definition


Reasonable suspicion in more than a hunch but less than proof of wrongdoing by a preponderance of the evidence.




U.S. v. Sokolow, 490 U.S.  1, 7 (1989)